FR37347E - Microphone à grande intensité de courant - Google Patents

Microphone à grande intensité de courant

Info

Publication number
FR37347E
FR37347E FR37347DA FR37347E FR 37347 E FR37347 E FR 37347E FR 37347D A FR37347D A FR 37347DA FR 37347 E FR37347 E FR 37347E
Authority
FR
France
Prior art keywords
high current
current microphone
microphone
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Inventor
Raymond-Leon-Paul Lacroix
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR37347E publication Critical patent/FR37347E/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR37347D 1929-08-14 1929-08-14 Microphone à grande intensité de courant Expired FR37347E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR37347T 1929-08-14

Publications (1)

Publication Number Publication Date
FR37347E true FR37347E (fr) 1930-11-15

Family

ID=8673990

Family Applications (2)

Application Number Title Priority Date Filing Date
FR607542D Expired FR607542A (fr) 1929-08-14 1925-12-08 Microphone à grande intensité de courant
FR37347D Expired FR37347E (fr) 1929-08-14 1929-08-14 Microphone à grande intensité de courant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR607542D Expired FR607542A (fr) 1929-08-14 1925-12-08 Microphone à grande intensité de courant

Country Status (1)

Country Link
FR (2) FR607542A (fr)

Also Published As

Publication number Publication date
FR607542A (fr) 1926-07-03

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